| All Patents in class 51/308 |
Patents 1 -
5
of 5
      |
| Picture | Number | Date | Patentee | Title |
 | 187,167 | Feb. 06, 1877 | F.B. Norton | Improvement in grinding and polishing surfaces and wheels |
| | 237,311 | Feb. 01, 1881 | F.B. Norton | Art of Preparing Emery in the Manufacture of Grinding Stones |
 | 2,027,307 | Jan. 07, 1936 | E.C. Schacht | Method of coating and apparatus therefor and product |
| | 2,749,685 | Jun. 12, 1956 | G. Baldwin | Grinding Wheel |
| | 5,536,282 | Jul. 16, 1996 | R.A. Gary, S.C. Yoon | Method for Producing an Improved Vitreous Bonded Abrasive Article and the Article Produced Thereby |
